The Shop > Electronics & IC Programing

Inverters and Filters

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PekkaNF:
You also need to put tht filter and VFD into metal enclosure and use screened cable to the motor.

This sort of stuff:
http://www.arceurotrade.co.uk/Catalogue/High-Speed-Spindles-Motors-Inverters

That diagram is good:
http://www.arceurotrade.co.uk/images/client/Spindle-Wiring-2.gif
just the inverter and filter in emi-tight metal enclosure. You also need proper cable glands.

I have been using this kind of filters:
http://www.arceurotrade.co.uk/imagecache/4b9a5b8f-0df1-46aa-8d77-9e09011bafe7_300x177.jpg

I probably still have some european made left.
http://www.schaffner.com/en/products/emcemi.html

When you have some of this type EMI filters the leakage current might be enough to trip RCD. Then you want "low leakage model". Older good ones definately had enough current to trip the RCD.

Some industrial/computer equipment has IEC Inlet Filters (Power entry module). Which is nice because you can use IEC computer mains cable in it and it will provide good screening on cabinet. No need for shielded cable gland. Filtering is not the greatest and on domestic computer supply the current rating might be on the low side, but this is an option if you have the junk allready.

Panels/inverters shoulf have pretty substantial over voltage protection and some sort of filtering. You actually could get some interference from the PV inverter.

Pekka

appletree:
Hi Pekka
Thank you for your input, some good information there, hopefully the installer is coming Wednesday so we will discus things then.   

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